guys are brothers. the man at largeisdzhokhartsarna,tsarnaevandlooking to confirm his origin. >> according to mike barnicle and "the boston globe" reporting one of the suspects has lived here for some time, receiving some sort of high school scholarship. >> yeah. the city of cambridge awards a scholarship $2,500 to cambridge high school seniors and others who want to pursue higher education. according to the globe, the man at large, the 19-year-old in the white hat, in 2011, so just two years ago, was the recipient of one of these scholarships. that indicates he has lived in the cambridge area for some time. >> another piece of information that we have picked up over the hours here is that at some time, any time now, the police in boston will be conducting a controlled detonation at the area of calm in charles gate. this is according to their twitter site. i guess if anybody in the area hears something, not to be upset by it because this is a controlled detonation probably, as pete williams was telling us, probably one of the explosives or grenades that were thrown out of the